Invalid rust syntax in generated constants

[Michael-F-Bryan]

Input C/C++ Header

#include <r_lib.h>

Bindgen Invokation

extern crate bindgen;

use std::env;
use std::path::Path;

fn main() {
    let out_dir = env::var("OUT_DIR").unwrap();
    let _ = bindgen::builder()
        .header("bindings.h")
        .clang_arg("-I/usr/include/libr/")
        .generate()
        .unwrap()
        .write_to_file(Path::new(&out_dir).join("ffi.rs"));
}

Actual Results

$ cargo build
   Compiling radare2-sys v0.1.0 (file:///home/michael/Documents/radare2-sys)
error: unexpected token: `;`
   --> /home/michael/Documents/radare2-sys/target/debug/build/radare2-sys-53f778355b791841/out/ffi.rs:126:31
    |
126 | pub const INFINITY: f32 = inf.;
    |                               ^

error: unexpected token: `;`
   --> /home/michael/Documents/radare2-sys/target/debug/build/radare2-sys-53f778355b791841/out/ffi.rs:127:26
    |
127 | pub const NAN: f32 = NaN.;
    |                          ^

error: aborting due to 2 previous errors

error: Could not compile `radare2-sys`.

Expected Results

Bindgen shouldn't generate invalid syntax when declaring the two 32-bit float constants. That exact same C header file compiles fine when using Clang:

$ clang -I/usr/include/libr bindings.h

I am trying to generate bindings for radare2. radare2 was installed from source and its include files are put in /usr/include/libr.

RUST_LOG=bindgen Output

(output is identical to Actual Results section)

Miscellaneous Other Details

rustc: rustc 1.17.0-nightly (6f10e2f63 2017-03-14)
cargo: cargo 0.18.0-nightly (4a3c0a63b 2017-03-12)
bindgen: 0.22.1
llvm: 3.9.1
target triple: x86_64-unknown-linux-gnu
OS: Arch Linux

[emilio]

Reduced test case:

#define INFINITY (1.0f/0.0f)
#define NAN (0.0f/0.0f)

[Michael-F-Bryan]

@emilio, thanks for simplifying the test case. I haven't looked through the radare2 source code yet, so I wasn't sure whether they came from a basic #define NAN (0.0f/0.0f) or if it was something more complex than that.

[emilio]

No worries! Fix over #583.